code: def test_grad(self):
      mesh = jtu.create_global_mesh((4,), ("x",))
      np_inp = np.arange(8.0)
      s = NamedSharding(mesh, P("x"))
      inp = jax.device_put(np_inp, s)
  
      def _cb(s):
          self.assertFalse(s.is_fully_replicated)
          self.assertLen(s.device_set, mesh.size)
          self.assertEqual(s.shard_shape(np_inp.shape), (2,))
  
      def f(x):
          y = jnp.arange(8.0)
          x_, y_ = shard_alike(x, y)
          jax.debug.inspect_array_sharding(y_, callback=_cb)
          z = x_ + y_
          return jnp.sum(z)
  
      jax.grad(f)(inp)  # doesn't crash
      jax.grad(jax.jit(f))(inp)
  
imports: import os
  import jax
  import jax.numpy
  import numpy
  from absl.testing import absltest
  from jax._src import xla_bridge
  from jax._src import test_util
  from jax.sharding import NamedSharding, PartitionSpec
  from jax.experimental.shard_alike import shard_alike
  from jax.experimental.shard_map import shard_map
  from jax._src.lib import xla_extension_version
  from jax import config
label_desc: Use image node_id 9 for calling the ShardAlikeTest obj's underlying member method code with example usage: obj.test_grad() and returns: jnp